WO2016150105A1

WO2016150105A1 - Fault location method, device and system for ethernet link

Info

Publication number: WO2016150105A1
Application number: PCT/CN2015/088785
Authority: WO
Inventors: 秦川
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-03-20
Filing date: 2015-09-01
Publication date: 2016-09-29
Also published as: CN106034045A

Abstract

The present invention provides a fault location method, device and system for an Ethernet link. The method comprises: an MEP selects at least one path from an Ethernet link, and sends a corresponding loss measurement message to each of the selected paths, a final node in each path being a target node, the target node being an MIP, and identification information about the target node being carried in the loss measurement message; the MEP receives a responding loss measurement reply message, comprising transmitting/receiving packet statistical information and identification information corresponding to the target node on each path, of the target node; and the MEP locates, according to the responding loss measurement reply message of the target node on each path, a faulty path section in the selected path. The problem in the prior art that it is difficult to detect specific path section information about a faulty node in the case of service flashing and slight packet loss is solved, and Ethernet faults can be specifically located, thereby making it convenient for an engineer to maintain and handle each device in the Ethernet.

Description

Method, device and system for fault location of Ethernet link

Technical field

The present invention relates to the field of communications, and in particular, to a method, device, and system for fault location of an Ethernet link.

Background technique

With the continuous development of carrier-grade Ethernet technology in recent years, its related technologies have also matured. In a carrier-class network, Operation Administration and Maintenance (OAM) is one of the key technologies in the network. The current OAM function lacks end-to-end management and monitoring capabilities for each user or each service. The complete Ethernet OAM mechanism enables end-to-end monitoring, management, diagnostics, and performance detection functions. The complete OAM function is the basis and premise that Ethernet can be applied to carrier-class networks. The International Telecommunication Union's latest standard, Y.1731, defines the various mechanisms for OAM in Carrier Ethernet, and defines the hierarchical architecture and required functions in Ethernet OAM. It not only defines various fault management functions. It also defines the performance monitoring function of Ethernet. A variety of fault management functions are defined in the standard, the main purpose of which is to detect, verify, locate and advertise different fault conditions. In the current technology, the following four methods mainly include detecting Ethernet faults:

CC (Continuity Check): It is used to detect the connectivity state between MEPs and is an active OAM. It is used to detect the Loss Of Continuity (LOC) between any pair of MEPs (Maintenance Association Endpoints) in a MEG (Maintenance Entity Group), although it can detect MEP to MEP nodes. The fault is faulty, but the location of the specific link of the faulty node cannot be located. Which MIP (Maintenance association Intermediate Point) has a problem.

LB (Loopback): The Ethernet loopback function is used to check the connectivity between a MEP and a MIP or a peer MEP. However, due to the low frequency, when a service flash occurs and a micro packet is lost, it is very It is difficult to detect the specific node location of the packet loss.

LT (Linktrace): The Ethernet link tracking function is an on-demand OAM function. It is mainly used for error location and proximity confirmation. However, due to the low frequency, when a service flash occurs, a small packet loss occurs. When it is difficult to detect the specific node location of the packet loss.

LM (Frame Loss Measurement): The frame loss measurement function is implemented by transmitting a frame with LM information to its peer MEP and similarly receiving a frame with LM information from the peer MEP. Used to measure the frame loss rate. Although the LM can detect the packet loss rate between the MEP and the MEP node, it cannot locate the specific link location of the faulty node.

For a fault in the project, for example, a brief interruption occurs in the network on average for several days, affecting the service and it is difficult to locate the location of the specific fault node, and the engineering positioning is difficult. In the current OAM mechanism, although there are four types of mechanisms for detecting faults: CC, LB, LT, and LM, each has application restrictions. When a service is flashed and a small amount of packet loss occurs, it is difficult to detect a specific packet loss. Node location.

Summary of the invention

The embodiment of the invention provides a method, a device and a system for fault location of an Ethernet link, which solves the problem that the prior art has difficulty in detecting the specific road segment information of the faulty node when the service is flashed and a slight packet loss occurs.

In order to solve the above problem, the embodiment of the present invention adopts the following technical solutions:

A method for fault location of an Ethernet link includes:

The maintenance association endpoint selects at least one path in the Ethernet link, the last node in each path is a target node, and the target node is a maintenance association intermediate node, and sends a corresponding loss measurement to each selected path. a message, where the lost measurement message carries identification information of the target node;

The maintenance association endpoint receives the lost measurement response message including the packet statistics information and the identification information of the corresponding target node in response to the target node on each path;

The maintenance association endpoint locates the faulty road segment in the selected path according to the lost measurement response message of the target node response on each path.

In the embodiment of the present invention, the lost measurement packet further carries the path information of the corresponding path, where the path information includes: the hop count of the path; the hop count of the path is used to maintain the path selected by the associated endpoint Determine the number of nodes that pass.

In the embodiment of the present invention, the path information further includes: path identification information corresponding to the path and identification information of an intermediate node corresponding to the hop count of each path in the path; the path identifier information is used by the maintenance association endpoint Matching the missing measurement reply message in the corresponding path; the identification information is used for the identification information of each node determined by the maintenance association endpoint in the path selected by the maintenance end point.

In the embodiment of the present invention, the path identifier information includes: a random field.

In the embodiment of the present invention, the method for locating the faulty path in the selected path according to the lost measurement response message of the target node response on each path specifically includes: receiving the lost measurement response message according to each path. Calculate the packet loss rate of the corresponding path; compare the packet loss ratios in different paths; and locate the faulty road segment according to the comparison result.

A method for locating an Ethernet link fault, wherein the last node selected by the maintenance associated endpoint is a path for maintaining the associated intermediate node, and the last node is a target node, including:

The target node receives a loss measurement message that is sent by the maintenance association endpoint and carries the identification information of the target node;

And sending, by the target node, the lost measurement response message carrying the packet statistics information and the identification information thereof to the maintenance association endpoint according to the loss measurement message.

In the embodiment of the present invention, the lost measurement packet further carries path information of the corresponding path, where the path information includes: a hop count of the path;

When the maintenance association intermediate node determines that the hop count is greater than 1, the maintenance association intermediate node is an intermediate node, and the maintenance association intermediate Node will The hop count is decreased by 1, and the lost measurement message is forwarded to the next node;

When the maintenance association intermediate node determines that the hop count is 1, the maintenance association intermediate node is a target node, and the target node responds to the maintenance association endpoint with a lost measurement response message.

A device for fault location of an Ethernet link, comprising:

a path selection module, configured to maintain an association endpoint to select at least one path in the Ethernet link, a last node in the path is a target node, and the target node is a maintenance association intermediate node;

The packet sending and receiving module is configured to send, by the maintenance association endpoint, a corresponding lost measurement packet to each selected path, where the lost measurement packet carries the identification information of the target node, and is further configured to receive the information on each path. The target node responds with the packet loss statistical response information of the corresponding node and the lost measurement response message of the identification information;

The fault locating module is configured to locate, by the maintenance association endpoint, the faulty road segment in the selected path according to the lost measurement response message of the target node response on each path.

A device for fault location of an Ethernet link, comprising:

a processing module, configured to be in a path that maintains an associated intermediate node in the last node selected by the maintenance association endpoint, and the last node is a target node, where the target node receives the identification information carried by the maintenance association endpoint and carries the target node. Lost measurement message;

The processing module is further configured to send, by the target node, the lost measurement response message carrying the packet statistics information and the identification information thereof to the maintenance association endpoint according to the lost measurement message.

The device for fault location of the Ethernet link further includes a judging module, wherein the judging module is configured to: when the path includes at least one maintenance association intermediate node in addition to the target node, the maintenance association intermediate node determines the hop Whether the number is greater than 1;

The processing module is further configured to: when the determination result of the determining module is yes, the maintenance associated intermediate node is an intermediate node, and the maintenance associated intermediate node is set to reduce the hop count by one, and the lost The measurement message is forwarded to the next node; when the judgment result of the determination module is no, the maintenance association intermediate node is the target node, and the target node is set to respond to the maintenance association endpoint with the lost measurement response message. .

An Ethernet link fault location system, comprising: a maintenance association endpoint and at least one maintenance association intermediate node; the maintenance association endpoint comprising the apparatus for fault location of an Ethernet link according to claim 8 or 10; Maintaining the associated intermediate node comprises the means for fault location of the Ethernet link as claimed in claim 11 or 12.

Advantageous effects of embodiments of the present invention:

The embodiment of the present invention provides a method, a device, and a system for locating an Ethernet link fault. The MEP sends a corresponding loss measurement packet to the selected path in the Ethernet link, and the last node in each path. For the target node, the lost measurement message includes the identification information of the target node, and the target node is a MIP; the MEP receives the packet information of the target node on each path, including the corresponding target node, and the loss of the identification information. The response message is measured, and the faulty road segment is located in the selected path according to the lost measurement response message of the target node response on each path. In the computer system of the LM, the LM frame of the packet loss rate detection is mainly introduced in the MIP node, and the lost measurement response message returned by each target MIP is located according to the MEP to the MIP in each path. The location of the link between the two nodes that have failed, so as to achieve specific positioning of the Ethernet fault, and facilitate the maintenance and processing of the equipment in the Ethernet by the engineering personnel.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method for fault location of an Ethernet link according to Embodiment 1 of the present invention;

2 is a schematic diagram of a connection diagram of a network in an Ethernet link according to Embodiment 1 of the present invention;

3 is a flowchart of a method for fault location of an Ethernet link according to Embodiment 2 of the present invention;

4 is a schematic structural diagram of an apparatus for fault location of an Ethernet link according to Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for fault location of an Ethernet link according to Embodiment 4 of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1:

As shown in FIG. 1 , it is a flowchart of a method for fault location of an Ethernet link according to Embodiment 1 of the present invention;

S101: The MEP selects at least one path in the Ethernet link, and the last node in each path is a target node, and sends a corresponding loss measurement packet to each selected path, where the lost measurement packet is in the lost measurement packet. Including the identification information of the target node, where the target node is a MIP;

When it is required to detect a fault in the Ethernet link, the MEP first selects a link to be detected in the Ethernet link according to its requirement, thereby determining at least one target node MIP, thereby determining the location of the target MIP according to the determined target. Selecting the corresponding path, and ensuring that the last node in each path is the corresponding target MIP, and then carrying the identification information of the MIP that needs to be detected in the LMM that it sends; the identification information of the target node includes: the MAC of the target node (physical address); that is, each of the paths selected by the MEP is correspondingly sent with an LMM including a MAC of the corresponding target node;

S102: The MEP receives, by the target node on each path, a lost measurement response message that includes the packet statistics information and the identification information of the corresponding target node.

The sending and receiving packet statistics information includes: the statistical information of the received and sent packets stored in the LMM received by the target node; or the statistical information of the received and received packets stored in the LMM received by the target node and the statistical information of the received and received packets of the target node itself; That is, on each path, when receiving the LMM sent by the MEP, the target node needs to respond to its own Light Weight Mobile Routing (LMR) to the sending MEP.

S103: The MEP locates the faulty road segment in the selected path according to the lost measurement response packet of the target node response on each path;

Since the target node on each path feeds its LMR back to the sender MEP, the MEP performs statistics based on the LMR received on each path to obtain the location of the faulty road segment on the selected path. Specifically, in the loss measurement function, specifically, the calculation of the packet loss rate of the LMR obtains the fault in the Ethernet link. In this embodiment, the loss between each target node and the MEP is mainly The packet rate is calculated, and then the packet loss rate calculated by the corresponding target node in each path is compared, and the specific road segment in which the failure occurs in the selected path can be obtained. In the embodiment of the present invention, the MEP calculates the packet loss rate of the corresponding path according to the lost measurement response message received in each path; compares the packet loss rate in different paths; and locates the faulty road segment according to the comparison result. For example, as shown in FIG. 2, which is a schematic diagram of a connection diagram of a network in an Ethernet link according to Embodiment 1 of the present invention, refer to FIG. 2. Among the selected two paths, one path includes: MEP A and target. Node MIP B; another path includes: MEP A, intermediate node MIP B, and target node MIP C; node MEP A sends a corresponding LMM in the two paths, and in the received response LMR, node MEP A is detected. There is no packet loss between the node MIP B, and there is a packet loss between the node MEP A and the node MIP C. The node MEP A can locate the packet loss ratio based on the packet loss measured between each MIP and the MIP A. The specific node location of the packet loss is between node MIP B and node MIP C.

Specifically, the lost measurement packet further carries path information of the corresponding path, where the path information includes: a hop count of the path; the hop count of the path is used by the number of nodes determined by the MEP for the path selected by the MEP. The purpose of detecting on-demand is further achieved by the number of hops of the LMM sent by the MEP on each path selected and the limit of the nodes that need to pass, that is, which road segment needs to be detected, and the corresponding road segment is set. Which target nodes are passed, and the identification information of which target nodes are carried by the LMM corresponding to the target node, so as to specifically locate the communication failure of each target node.

In the embodiment of the present invention, the path information further includes: path identification information corresponding to the path, and identification information of an intermediate node corresponding to the hop count of each level in the path; the path identifier information is used for the MEP matching In the path The measurement response message is lost; the identification information is used for identification information of each node determined by the MEP in the path selected by the MEP; since each time the Ethernet link is detected, the MEP may simultaneously go to multiple pieces. The selected path sends the LMM. Therefore, a path identification information is set in the LMM that it sends to distinguish the LMR of each received path information including the corresponding path. That is, when the MIP sends the LMR, it needs to copy the received LMM. The information carried in the information is fed back to the MEP, so that it is more convenient and fast for the MEP to locate the specific location of the fault of each path; the path identifier information may include: performing simple number identification information on the target node by using a random number; Or, the simple numbering of all the nodes in the entire path is performed by using a random number; the two methods are used to identify the target node in the LMR received by the MEP; and the step S103 specifically includes: the MEP The LMR with the same path identification information locates the link where the corresponding path in the same path identification information fails.

In this embodiment, the MEP side detects the fault in the Ethernet link by sending the LMM to the at least one target MIP through the MEP, and locates the faulty faulty path in the selected path according to the LMR received by the MEP. It achieves the effect of accurate positioning and convenient maintenance of engineering personnel.

Embodiment 2:

As shown in FIG. 3, it is a flowchart of a method for locating an Ethernet link fault according to Embodiment 2 of the present invention; referring to FIG. 3, the last node selected by the maintenance associated endpoint is in a path of maintaining the associated intermediate node, and The last node is a target node, including:

S301: The target node receives an LMM that is sent by the MEP and carries the identification information of the target node.

The identification information of the target node includes: a MAC of the target node

S302: The target node sends, according to the LMM, the LMR carrying the packet sending and receiving statistical information and the identification information to the MEP.

The sending and receiving packet statistics information includes: the statistical information of the received and sent packets stored in the LMM received by the target node; or the statistical information of the received and received packets stored in the LMM received by the target node and the statistical information of the received and received packets of the target node itself; The statistical information of the transceiver packet is carried in the LMR for the purpose of calculating the packet loss rate of the MEP, thereby achieving the purpose of accurately locating the fault.

After the target MIP sends the LMR, the LMM may be directly terminated or transparently transmitted, but if the transparent transmission is performed, other nodes do not process the LMM.

Specifically, the lost measurement packet further carries path information of the corresponding path, where the path information includes: a hop count of the path; when the path includes at least one maintenance associated intermediate node in addition to the target node, The maintenance association intermediate node determines that the hop count is greater than 1, and the maintenance association intermediate node is an intermediate node, and the maintenance association intermediate node decrements the hop count by 1, and forwards the lost measurement packet to the next one. a node; when the maintenance association intermediate node determines that the hop count is 1, the maintenance association intermediate node is a target node, and the target node responds to the maintenance association endpoint with a lost measurement response message. Specifically, when it is determined that the hop count is greater than 1, after the hop count is decremented by 1, the LMM is directly forwarded to the next node; when it is determined that the hop count is 1, the MIP is a target node, The MIP then determines whether the identification information of the target node is its own identification information, and if so, responds to the LMR to the MEP. and After sending the LMR to the MEP, it directly terminates the LMM it receives.

In the embodiment of the present invention, the path information further includes: path identification information corresponding to the path and identification information of an intermediate node corresponding to the hop count of each level in the path; when the MIP is an intermediate node, receiving the After the LMM, the identification information of the intermediate node corresponding to the hop count of the LMM in the LMM is compared with its own identification information. If the same, the hop count is decremented by 1 and then sent; if not, directly And sending the path identifier information in the LMM, and carrying the copied path identifier information in the LMR sent to the MEP. In order for the MEP to distinguish the LMRs of the paths it receives, it is possible to obtain the road segments in each path that have failed.

In the following, the specific road segment on the path is located on multiple paths, including the MEP and multiple MIPs, by using specific embodiments:

The MEP sends, to each path, an LMM packet carrying the path hop count, the identification information of the node corresponding to each hop of the path, the path identifier information, and the identification information of the target node in the corresponding path, each path including at least one MIP, and the path identifier information includes For a random field, after the MEP node sends an LMM to each MIP node of the other path, the value of the field is modified. When the MEP node receives the responding LMR frame, it needs to use the path identification information to match the corresponding target. a node; the identification information of the node corresponding to each hop of the path and the identification information of the target node include: a MAC of the corresponding node;

When receiving the LMM, the MIP performs packet identification on the LMM, and determines whether the MAC address in the LMM matches the MIP node MAC address. If it matches, it determines whether the current hop is based on the path hop count, that is, the hop count is 1. If yes, the path identifier information and the packet statistics information in the LMM are copied to the LMR. Before returning the LMR to the source MEP, the LMR needs to increase the packet statistics of the MIP node itself. If the number of hops of the path is not the current hop, after the hop count is decremented by 1, the LMM is sent to the next node;

After the source MEP receives the LMR, the MEP can detect the connection relationship with multiple target MIP nodes at the same time. When the MEP receives the LMR message, it needs to know which path and which node sends the message. The path identification information in the message identifies which MIP node on that path. After receiving the LMR message, the MEP extracts the statistics of the packet and the packet, and uses the LM computer system to calculate the frame loss rate, determine whether there is a packet loss between the MIP node, and then calculate the packet loss rate of each path according to the calculation. The packet loss rate in the path is compared to locate a specific fault segment.

In this embodiment, the method for fault location in the Ethernet link is used. The target MIP on each path needs to feed back the LMR to the MEP at the source end. The MEP locates the faulty path of the corresponding path according to each LMR, thereby facilitating the engineering personnel. Maintenance of this path.

Embodiment 3:

FIG. 4 is a schematic structural diagram of an apparatus for locating an Ethernet link fault according to Embodiment 3 of the present invention. Referring to FIG. 4, the apparatus 40 for fault location of an Ethernet link includes: a path selection module 401, and a report. The transceiver module 402 and the fault locating module 403; the path selection module 401 is configured to select at least one path in the Ethernet link, the last node in the path is a target node, and the target node is a maintenance association. An intermediate node; the packet sending and receiving module 402 is configured to send, by the MEP, a corresponding LMM to each selected path, where the LMM carries identification information of the target node; and is further configured to receive a target node response on each path. Packet statistics including the corresponding node And an LMR for identifying information; the fault location module 403 is configured to locate, by the MEP, a faulty road segment in the selected path according to the LMR of the target node response on each path. When it is required to detect a fault in the Ethernet link, the path selection module 401 first selects a link to be detected in the Ethernet link according to its requirement, thereby determining at least one target node MIP, and then determining according to the determined The location of the target MIP selects the corresponding path, and ensures that the last node in each path is the corresponding target MIP; then, the packet sending and receiving module 402 carries the identification information of the MIP that needs to be detected in the LMM that it sends; The identification information of the target node includes: a MAC (physical address) of the target node; that is, each of the paths selected by the MEP respectively sends an LMM including a MAC of the corresponding target node; the statistical information of the transceiver packet includes: The statistical information of the received and sent packets stored in the LMM received by the target node; or the statistical information of the received and received packets stored in the LMM received by the target node and the statistical information of the received and received packets of the target node; that is, on each path, receiving When going to the LMM sent by the MEP, the target node needs to respond to its own LMR to the sender MEP; since each path feeds its LMR back to MEP sending end, and therefore, the fault location module 403 according to the received statistics on each path of the LMR, to give the selected path link fault present. Specifically, in the loss measurement function, the calculation of the packet loss rate of the LMR is mainly obtained by the faulty link in the Ethernet link. In this embodiment, the fault location module 403 is mainly received according to each path. The lost measurement response message calculates the packet loss rate of the corresponding path; compares the packet loss rate in different paths; and locates the faulty road segment according to the comparison result. The device 40 for fault location of the Ethernet link is placed in the MEP.

Embodiment 4:

As shown in FIG. 5, a schematic structural diagram of an apparatus for locating an Ethernet link fault according to Embodiment 4 of the present invention is shown in FIG. 5. The apparatus 50 for locating an Ethernet link fault includes: a processing module 501; The module 501 is configured to be in a path where the last node selected by the MEP is a MIP, and the last node is a target node, and the target node receives an LMM that is sent by the MEP and carries identification information of the target node; the processing module 501 further The target node is configured to send, according to the LMM, an LMR carrying the packet statistics and its identification information to the MEP. The sending and receiving packet statistics information includes: the statistical information of the received and sent packets stored in the LMM received by the target node; or the statistical information of the received and received packets stored in the LMM received by the target node and the statistical information of the received and received packets of the target node itself; The statistical information of the transceiver packet is carried in the LMR for the purpose of calculating the packet loss rate of the MEP, thereby achieving the purpose of accurately locating the fault. The apparatus for locating the fault of the Ethernet link is generally disposed in the MIP, so that the MIP distinguishes the function of not transmitting the LMR in the prior art. It is because the MIP has the function of sending the LMR, so that the MEP receives each path. After the LMR of the target MIP feedback, it can accurately locate the faulty section.

In some embodiments, the LMM further carries path information of a corresponding path, where the path information includes: a hop count of the path; the device 50 for fault location of the Ethernet link further includes a determining module, where the determining module is configured The MIP determines whether the hop count is greater than 1 when the path includes at least one MIP in addition to the target node. The processing module 501 is further configured to: when the judgment result of the determining module is yes, The MIP is an intermediate node, and the MIP is set to reduce the hop count by one, and forward the LMM to the next node; when the judgment result of the determining module is no, the MIP is a target node, and the setting is performed. Responding to the MEP for its LMR for the target node.

The embodiment of the present invention further provides a system for fault location of an Ethernet link, including: an MEP and at least one MIP; the MEP is configured to select at least one path in the Ethernet link, and the last of the paths The node is the target node, The target node is a maintenance associated intermediate node, and sends a corresponding LMM to each selected path, where the LMM carries identification information of the target node; when the MIP is the target node, the target MIP is set to receive the MEP. And sending, by the LMM, an LMM carrying the identification information of the target node, and sending, according to the LMM, the LMR carrying the statistics of the received and sent packets and the path information to the MEP; the MEP is further configured to receive the corresponding response on each path respectively. The target node sends and receives packet statistics and LMR of the path information, and locates the failed segment in the selected path according to the LMR of each path response. When the MIP is an intermediate node, the MIP directly forwards the loss measurement packet to the next node.

The embodiment of the invention provides a method, a device and a system for fault location of an Ethernet link. On the computer system of the LM, the LM frame of the packet loss rate detection is mainly introduced on the MIP node, and the MEP is adopted according to each path. The lost measurement response message returned by the target MIP node between the MIPs locates the location of the link between the two nodes that are faulty, thereby realizing the specific positioning of the Ethernet fault and facilitating the maintenance of the equipment in the Ethernet by the engineering personnel. And management.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Industrial applicability

The technical solution provided by the embodiment of the present invention can be applied to an Ethernet link fault location process. In the embodiment of the present invention, the LM frame of the LM is mainly used to introduce the LM frame of the packet loss rate detection on the MIP node, and the response packet is returned according to the loss measurement returned by each target MIP according to the MEP to the MIP in each path. The location of the link between the two nodes that are faulty is located to achieve specific positioning of the Ethernet fault, which facilitates the maintenance and processing of each device in the Ethernet by the engineering personnel.

Claims

A method for fault location of an Ethernet link includes:

The maintenance association endpoint selects at least one path in the Ethernet link, the last node in each path is a target node, and the target node is a maintenance association intermediate node, and sends a corresponding loss measurement to each selected path. a message, where the lost measurement message carries identification information of the target node;

The maintenance association endpoint receives the lost measurement response message including the packet statistics information and the identification information of the corresponding target node in response to the target node on each path;

The maintenance association endpoint locates the faulty road segment in the selected path according to the lost measurement response message of the target node response on each path.
The method for fault location of an Ethernet link according to claim 1, wherein the lost measurement message further carries path information of a corresponding path, where the path information includes: a hop count of the path; The number of nodes used to maintain the path determined by the associated endpoint for its selection.
The method for fault location of an Ethernet link according to claim 2, wherein the path information further includes: path identification information corresponding to the path and identification information of an intermediate node corresponding to each hop count in the path; The path identifier information is used to match the lost measurement response message in the path corresponding to the maintenance association endpoint; the identification information is used by the maintenance association endpoint to identify the identification information of each node that is determined in the path selected by the association endpoint.
The method for fault location of an Ethernet link according to claim 3, wherein the path identification information comprises: a random field.
The method for fault location of an Ethernet link according to any one of claims 1 to 4, wherein the lost measurement response message according to the target node response on each path locates the faulty road segment in the selected path. The method includes: calculating a packet loss rate of the corresponding path according to the lost measurement response message received in each path; comparing the packet loss ratios in different paths; and determining the faulty road segment according to the comparison result.
A method for locating an Ethernet link fault, wherein the last node selected by the maintenance association endpoint is a path for maintaining the associated intermediate node, and the last node is a target node, and the method includes:

The target node receives a loss measurement message that is sent by the maintenance association endpoint and carries the identification information of the target node;

And sending, by the target node, the lost measurement response message carrying the packet statistics information and the identification information thereof to the maintenance association endpoint according to the loss measurement message.
The method for locating an Ethernet link fault according to claim 6, wherein the lost measurement message further carries path information of a corresponding path, where the path information includes: a hop count of the path;

When the maintenance association intermediate node determines that the hop count is greater than 1, the maintenance association intermediate node is an intermediate node, and the maintenance association intermediate The node decrements the hop count by 1, and forwards the lost measurement message to the next node;

When the maintenance association intermediate node determines that the hop count is 1, the maintenance association intermediate node is a target node, The target node responds to the maintenance association endpoint with its lost measurement reply message.
A device for fault location of an Ethernet link, comprising:

a path selection module, configured to maintain an association endpoint to select at least one path in the Ethernet link, a last node in the path is a target node, and the target node is a maintenance association intermediate node;

The packet sending and receiving module is configured to send, by the maintenance association endpoint, a corresponding lost measurement packet to each selected path, where the lost measurement packet carries the identification information of the target node, and is further configured to receive the information on each path. The target node responds with the packet loss statistical response information of the corresponding node and the lost measurement response message of the identification information;

The fault locating module is configured to locate, by the maintenance association endpoint, the faulty road segment in the selected path according to the lost measurement response message of the target node response on each path.
The apparatus for locating an Ethernet link fault according to claim 8, wherein the lost measurement message further carries path information of a corresponding path, where the path information includes: a hop count of the path; a hop count of the path The number of nodes used to maintain the path determined by the associated endpoint for its selection.
The apparatus for fault location of an Ethernet link according to claim 9, wherein the path information further includes: path identification information corresponding to the path and identification information of an intermediate node corresponding to the hop count of each level in the path; The path identifier information is used to match the lost measurement response message in the path corresponding to the maintenance association endpoint; the identification information is used by the maintenance association endpoint to identify the identification information of each node that is determined in the path selected by the association endpoint.
A device for fault location of an Ethernet link, comprising:

a processing module, configured to be in a path that maintains an associated intermediate node in the last node selected by the maintenance association endpoint, and the last node is a target node, where the target node receives the identification information carried by the maintenance association endpoint and carries the target node. Lost measurement message;

The processing module is further configured to send, by the target node, the lost measurement response message carrying the packet statistics information and the identification information thereof to the maintenance association endpoint according to the lost measurement message.
The apparatus for fault location of an Ethernet link according to claim 11, wherein the lost measurement message further carries path information of a corresponding path, where the path information includes: a hop count of the path;

The device for fault location of the Ethernet link further includes a judging module, wherein the judging module is configured to: when the path includes at least one maintenance association intermediate node in addition to the target node, the maintenance association intermediate node determines the hop Whether the number is greater than 1;

The processing module is further configured to: when the determination result of the determining module is yes, the maintenance associated intermediate node is an intermediate node, and the maintenance associated intermediate node is set to reduce the hop count by one, and the lost The measurement message is forwarded to the next node; when the judgment result of the determination module is no, the maintenance association intermediate node is the target node, and the target node is set to respond to the maintenance association endpoint with the lost measurement response message. .
An Ethernet link fault location system includes: maintaining an associated endpoint and at least one maintenance association intermediate node; The maintenance association endpoint comprises the apparatus for fault location of an Ethernet link as claimed in claim 8 or 10; the maintenance association intermediate node comprising means for fault location of an Ethernet link as claimed in claim 11 or 12.